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 ###Instrução: Qual é o resultado da Copa Libertadores 1999 para o time Grêmio, que não se classificou para a Copa Conmebol 1999?
 ###Tabelas: CREATE TABLE alpg_tour_6 (alpg_tour_6_id AUTO_INCREMENT PRIMARY KEY, No. INT, Date VARCHAR, Tournament VARCHAR, Winning score VARCHAR, To par VARCHAR, Margin of victory VARCHAR, Runner(s)-up VARCHAR) CREATE TABLE step_races (step_races_id AUTO_INCREMENT PRIMARY KEY, !Race name INT, Grade VARCHAR, Racecourse VARCHAR, Distance VARCHAR, Priority-entry-rights to Derby VARCHAR) CREATE TABLE rankings_at_season's_end (rankings_at_season's_end_id AUTO_INCREMENT PRIMARY KEY, Position INT, 1990–1991 VARCHAR, 1991–1992 VARCHAR, 1992–1993 VARCHAR, 1993–1994 VARCHAR, 1994–1995 VARCHAR) CREATE TABLE list_of_the_most_populous_us_counties_sorted_according_to_the_mid-2011_official_estimate_by_the_uscb (list_of_the_most_populous_us_counties_sorted_according_to_the_mid-2011_official_estimate_by_the_uscb_id AUTO_INCREMENT PRIMARY KEY, Rank VARCHAR, County VARCHAR, State VARCHAR, Land area (km²) VARCHAR, Land area (mi²) VARCHAR, April 1, 2010 census VARCHAR, April 1, 2010 density (/km²) VARCHAR, April 1, 2010 density (/mi²) VARCHAR, July 1, 2010 official estimate VARCHAR, July 1, 2010 density (/km²) VARCHAR, July 1, 2010 density (/mi²) VARCHAR, July 1, 2011 official estimate VARCHAR, July 1, 2011 density (/km²) VARCHAR, July 1, 2011 density (/mi²) VARCHAR, Mid-2010 to mid-2011 change (Absolute) VARCHAR, Mid-2010 to mid-2011 change (%) VARCHAR, County seat or courthouse VARCHAR) CREATE TABLE brazilian_clubs_in_international_competitions (brazilian_clubs_in_international_competitions_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Copa Libertadores 1999 VARCHAR, Copa Mercosur 1999 VARCHAR, Copa CONMEBOL 1999 VARCHAR, Intercontinental Cup 1999 VARCHAR)  
SELECT Copa Libertadores 1999 FROM brazilian_clubs_in_international_competitions WHERE Copa CONMEBOL 1999 = did not qualify AND Team = grêmio